Tox is a new free, private, and secure messaging platform for chatting, file sharing, and audio & video call. In a Tox Messaging Platform, there is aTox Network, there is aTox Protocol, and there are many Tox client programs. qTox is one of many Tox client programs, and it is available in GNU/Linux as free software. It is also available to Ubuntu. This article introduces how to install qTox step-by-step in Ubuntu 16.10 and 16.04.